diff --git a/garage-cli/src/ffmpeg.rs b/garage-cli/src/ffmpeg.rs
index 84d2d46..05eba04 100644
--- a/garage-cli/src/ffmpeg.rs
+++ b/garage-cli/src/ffmpeg.rs
@@ -4,6 +4,7 @@ use std::path::PathBuf;
 
 struct Args {
     input_path: Arg,
+    font_path: Arg,
     input_format: Arg,
     output_path: Arg,
     output_format: Arg,
@@ -23,8 +24,13 @@ pub fn ffmpeg_cmd() -> Command {
             .long("input_format")
             .value_name("FILE Extension")
             .value_parser(value_parser!(String))
-            .default_value("mp4")
             .help("input directory path"),
+        font_path: Arg::new("font_path")
+            .long("font_path")
+            .value_name("FILE")
+            .value_parser(value_parser!(PathBuf))
+            .required(true)
+            .help("input fonts directory path"),
         output_path: Arg::new("output_path")
             .long("output_path")
             .value_name("FILE")
@@ -53,7 +59,7 @@ pub fn ffmpeg_cmd() -> Command {
         .about("ffmpeg batch")
         .subcommand(Command::new("convert").about("").args([
             args.input_path.clone(),
-            args.input_format.clone(),
+            args.input_format.clone().default_value("mp4"),
             args.output_path.clone(),
             args.output_format.clone(),
             args.advance.clone(),
@@ -64,11 +70,15 @@ pub fn ffmpeg_cmd() -> Command {
                 .about("")
                 .args([args.input_path.clone()]),
         )
-        .subcommand(
-            Command::new("add_fonts")
-                .about("")
-                .args([args.input_path.clone()]),
-        )
+        .subcommand(Command::new("add_fonts").about("").args([
+            args.input_path.clone(),
+            args.input_format.clone().default_value("mkv"),
+            args.font_path.clone(),
+            args.output_path.clone(),
+            args.output_format.clone(),
+            args.advance.clone(),
+            args.exec.clone(),
+        ]))
 }
 
 pub fn parse_ffmpeg_cmd(sub_cmd: &str, args: &ArgMatches) {
@@ -78,12 +88,13 @@ pub fn parse_ffmpeg_cmd(sub_cmd: &str, args: &ArgMatches) {
         .to_owned();
     let input_format = args.get_one::<String>("input_format").expect("").to_owned();
     let output_path = args.get_one::<PathBuf>("output_path").expect("").to_owned();
-    let output_formart = args
+    let output_format = args
         .get_one::<String>("output_format")
         .expect("")
         .to_owned();
     let advance = args.try_get_one::<String>("advance").expect("").to_owned();
     let exec = args.get_flag("exec");
+    // println!("input path: {:?}", input_path);
 
     match sub_cmd {
         "convert" => {
@@ -91,14 +102,25 @@ pub fn parse_ffmpeg_cmd(sub_cmd: &str, args: &ArgMatches) {
                 .input_path(input_path)
                 .input_format(input_format)
                 .output_path(output_path)
-                .output_format(output_formart)
+                .output_format(output_format)
                 .advance(advance)
                 .exec(exec);
             let f = Batchffmpeg::new(opt);
             f.convert();
         }
         "add_sub" => {}
-        "add_fonts" => {}
+        "add_fonts" => {
+            let font_path = args.get_one::<PathBuf>("font_path").expect("").to_owned();
+            let opt = BatchffmpegOptions::new()
+                .input_path(input_path)
+                .input_format(input_format)
+                .output_path(output_path)
+                .font_path(font_path)
+                .advance(advance)
+                .exec(exec);
+            let f = Batchffmpeg::new(opt);
+            f.add_fonts();
+        }
         _ => {
             todo!()
         }
diff --git a/garage-ffmpeg/src/lib.rs b/garage-ffmpeg/src/lib.rs
index 018c79b..6fd45e1 100644
--- a/garage-ffmpeg/src/lib.rs
+++ b/garage-ffmpeg/src/lib.rs
@@ -1,4 +1,5 @@
 mod option;
+use std::fmt::format;
 use std::path::Path;
 use std::path::PathBuf;
 use std::process::Command;
@@ -77,15 +78,17 @@ impl Batchffmpeg {
             ];
             args.push(arg);
         }
-        for arg in args {
-            if self.option.exec {
+        if self.option.exec {
+            for arg in args {
                 let mut child = Command::new("ffmpeg")
                     .args(arg)
                     .stdout(Stdio::inherit())
                     .spawn()
                     .expect("fail to execute");
                 child.wait().unwrap();
-            } else {
+            }
+        } else {
+            for arg in args {
                 info!("ffmpeg {} {} {}", arg[0], arg[1], arg[2])
             }
         }
@@ -93,7 +96,41 @@ impl Batchffmpeg {
 
     pub fn add_sub(&self) {}
 
-    pub fn add_fonts(&self) {}
+    pub fn add_fonts(&self) {
+        let video_list = self.get_video_list(
+            self.option.input_path.clone(),
+            self.option.input_format.clone(),
+        );
+        let font_list = self.get_fonts_params(self.option.font_path.clone());
+        for f in font_list {
+            println!("font: {}", f);
+        }
+    }
 
-    pub fn get_fonts_params(&self) {}
+    pub fn get_fonts_params(&self, font_path: PathBuf) -> Vec<String> {
+        let mut file_list: Vec<String> = Vec::new();
+        let font_format_list = vec!["oft", "ttf"];
+        for entry in WalkDir::new(font_path) {
+            match entry {
+                Err(err) => {
+                    println!("error: {:?}", err);
+                }
+                Ok(dir_entry) => {
+                    if dir_entry.file_type().is_file() {
+                        match Path::new(dir_entry.file_name()).extension() {
+                            Some(format) => {
+                                let file_name = dir_entry.file_name().to_str().unwrap();
+                                let font_format = format.to_str().unwrap();
+                                if font_format_list.contains(&font_format) {
+                                    file_list.push(format!("{}.{}", file_name, font_format))
+                                }
+                            }
+                            None => {}
+                        }
+                    }
+                }
+            }
+        }
+        file_list
+    }
 }
diff --git a/garage-ffmpeg/src/option.rs b/garage-ffmpeg/src/option.rs
index 1e2cac3..49abc21 100644
--- a/garage-ffmpeg/src/option.rs
+++ b/garage-ffmpeg/src/option.rs
@@ -4,6 +4,7 @@ use std::path::PathBuf;
 pub struct BatchffmpegOptions {
     pub input_path: PathBuf,
     pub input_format: String,
+    pub font_path: PathBuf,
     pub output_format: String,
     pub output_path: PathBuf,
     pub advance: String,
@@ -15,6 +16,7 @@ impl BatchffmpegOptions {
         BatchffmpegOptions {
             input_path: PathBuf::new(),
             input_format: "".to_string(),
+            font_path: PathBuf::new(),
             output_path: PathBuf::new(),
             output_format: "".to_string(),
             advance: "".to_string(),
@@ -32,6 +34,11 @@ impl BatchffmpegOptions {
         self
     }
 
+    pub fn font_path(mut self, font_path: PathBuf) -> Self {
+        self.font_path = font_path;
+        self
+    }
+
     pub fn output_path(mut self, path: PathBuf) -> Self {
         self.output_path = self.output_path.join(path);
         self